Adding accumulator



May 5, 1925. 1,536,757

F. w. BERNAU ADDING ACCUMULATOR Filed Oct. 24, 1921 5 Sheets-Sheet l May 5, 1925. 1,536,757

F. w. BERNAU ADDING ACCUMULATOR Filed Oct. 24, 192] 5 Sheets-Sheet 2 May 5, 1925.

F. W. BERNAU ADDING Accxmum'ron Filed Oct. 24, 1921 5 Sheets-Sheet 3 May 5, 1925 F. W. BERNAU ADDI NG ACCUMULATOR Filed Oct. 24, 1921 5 Sheets-Sheet 4 ,Ievenior;

F. W. BERNAU ADDING Accumuoa Filed Oct. 24, 1921 5 Sheets-Sheet 5 Patented May 5, 1925.

UNITED STATES PATENT OFFICE.

FREDERICK W. BERNAU. OF NEWARK. NEW JERSEY. ASSIGNOR '10 ELLIS ADDING TYPEWBI'IER COMPANY, OF NEWARK, NEW JERSEY,

JERSEY.

ADDING ACCUMULATOR.

' Application filed mm. 24, 1921. Serial 110,510,029.

To all whom it may concern."

Be it known that I, FREDERICK W. Baa- NAU, a citizen of-the United States, residing at Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Adding Accumulators, of which the following is a specification. I

The patent to Halcolm Ellis, No. 1.197376. dated September 5, 1916, discloses accumulabors whichare; adapted for carrying on adding 0 rations.- Ellis Patent No. 1,203,863, ated November 7, 1916. discloses accumulators embodying certain new and useful improvements over the accumulators of the Ellis Patent No. .1.197.276 whereby the same accumulator is adapted for carrying on either addition or subtraction.

The peculiarit of the improved construc- I tion of the com ined adding and subtracting accumulator. of the Ellis Patent No. 1203,863 does not permit of the conversion thereof, by mere omission of the subtracting mechanism. into an accumulator which will be adapted for addition alone and yet the mechanism employed in that accumulator is so efiicient that it is desirable to convert it into an accumulator adapted only for addition.

I have found that the mere omission of the subtracting cam N, the subtracting hook N, and the selective bar N of the Ellis Patent No. 1.203.863 will not convert the accumulator into one which is adapted 36 for addition only but I have discovered that by omitting the aforesaid parts and by changing the shape of the cam slot in the adding cam N so that the enlarged head of said slot will be dispensed with, so much of the accumulator as pertains to effecting addition may be retained. after omitting those elements having to do with subtraction, and I thereby convert the accumulator into one which is adapted for addition only.

It is. therefore, the object of the present invention to convert the accumulator of the Ellis Patent No. 1,203,863 into a straight adding accumulator without having to modify the mechanism other than change the slot in the adding cam which controls the carrying detent. thus retaining all of the advantages inhering in the improved the carrying bar.

The mventlon being an improvement on 'provements in the' mechanism for operating the accumulator of the Ellis Patent No.

1.203.863 and a number of the parts comprising the mechanism being duplicates of a coarona'rron for New corresponding parts of the adding mechanism of the said patented Ellis construction; reference is to be had to Patent No. 1.203.863 in connection with the present drawings and following description. and for this reason only the improved accumulator and its operating means arcshown and set forth herein.

In the accompanving drawings:

Figure 1 is a lcft side elevation showing in detail one set of mechanisms of the improved adding accumulator. and a portion of the corresponding rack. the parts being in normal position.

' Fig. 2 is asimilar view of .the carrying bar operating mechanism arranged as it appears when the accumulator is in the position showh inFig. 1.

Fig. 3 is a detail elevation of the cam which causes the accumulator wheels or pinions to engage and disengage the racks. the parts being arranged to correspond with the condition represented in Fig. 1.

Fig. 4 is a view like Fig. 1 but showing the adding wheel or pinion in mesh with the rack and the carrying bar at its extreme forwardposition and about ready to disengage the adding cams of the accumulator.

Fig. 5 is a view like Fig. 2 but representing the position of the carrying bar operating means when the accumulator is inthe 9 is a view like Fig. 3 showing the position of the operating cam when the parts are in the position shown in Fig. 7.

Fig. 10 is a view like Fig. 1, the two pointed carrying cam on the inion having operated and passed the hodic and disengaged the latter from the adding cam,

-Fi 11 is a view like Fig. 2 showing the position of the parts corresponding to the condition represented in Fig. 10.

Fig. 12 is a view like Fig. 3 showing the positioh of the operating cam when the parts are as shown in'Fig. 10.

Fig. 13 is a view like Fig. l. the adding wheel having disengaged the rack and engaged. the carrying detent and the carrying bar having returned to normanl position. the operation of carrying having been effected by,the movement of the adding cam.

Fig. 14 is. a view like Fig. Q'showing the carrying bar operating parts back in their normal position corresponding to the goosi tion of the. carrying bar in Fig. 13.

Fig. 15 is a view like Fig. 3. representing the position of the operating cam when the parts -are Jas in the condition shown in Fig. 16 is a detail view of the adding cam showing the'improved form of slot adapting said cam to be used for the purpose of effecting carrying in the adding mechanism.

Fig. 17 is a detail view of the adding hook shown in reversed position from its arrangement in the preceding figures, to illustrate .its construction; and

Fig-18' is a detail view of the carrying detent or toothedsegment.

It will be understood that'the drawings disclose the mechanism for only one numerical order and that there are as many racks. adding .wheels or pinions, and adding mechanisms as there are numerical orders provided for by the machine. However. it will be understood that the carrying bar cooperates with all of the carrying mechanisms of the machine as may be arranged for carrying and that only one mechanism is used for the control of the carrying bar and that a pair of operating camsare used for controlling the engagement ofthe adding wheels with the racks and their disengagement therefrom.

In the same machine I may employ one or more accumulators adapted for addition alone, according to the present invention, or, in addition to one or more accumulators constructed and operating according to the present invention, there may be provided in the machine one or more combined adding and subtracting accumulators such. for instance, as set forth in the Ellis Patent No. 1,203,863. RA portion of one of the racks appears at The adding wheels N are mounted on a horizontal shaft N which extends through 'will pass underneath it. On the other hand,

the adding wheels and upon a shaft N are a series of adding hooks N which are shown 7 in detail in Fig. 17. of which there is one for each adding wheel. Each adding hook has a point- (1 adapted to be engaged by either end of the two-point camN at the proper time. The adding hook also has a lug 'w whose purpose will appear presentl The adding hook is operated by a spring N which tends to cause the point a to move toward the center of cam N The shape of the point of the hook N is such that inrotating the cam N in a direction so that it strikes the point of the hook N? while moving toward the shaft N the hook N will rise up and the point of the cam N" if the rotation of the cam N is in the reverse direction so that it engages the hook N in a direction moving from the shaft N. the cam N will stop against the inside of the hook N.

The hook N serves as a latch to normally retain the adding-cam N in latched posi- 1 lion but when the hook") is tripped by the engagement of the cam N therewith as above explained. the adding cam N is released and effects carrying. as will be presently described.

There are a number of parallel plates N" separated by suitable collars and readily connected together in a group by rods N.

Adding cam plates N (Fig. 16) are pivoted at N" to the plates N and are provided with notched parts which are adapted to be engaged by the lugs or lips w of the adding hooks K under normal conditions. The notches of the adding cams N receive the lips or lugs 10 of the adding hooks N when either point of the cam N engages the book a and elevates it as, in that event, the lower end of the adding hook N is depressed and the adding cam plate N is unlatched. For each adding cam plate N there is provided a spring N" which is connected to one of the plates N" and tends to rotate the adding cam plate so that its upper end moves in a downward direction in opposition to tho latched up position in which said plate is normally retained by the hook N".

In the Ellis Patent No. 1.203.863 the add ing cam plate N is provided with a cam slot which has a head, as shown in Fig. 35 of the said patent, such enlargement or head of the slot being rovided by reason of the combination with the adding cam plate N of the subtracting cam plate N of that patent.

Merely omitting plate N and its corresponding subtractmg hook N of the Ellis Patent N 0. 1,203; 863 and dispensing with the blocking or shift bar -N will not convert the accumulator of-that patent into a straight adding accumulator.

I have discovered that in addition to omit ting the bar X, thesubtracting cam plate N and the subtracting hook N of Patent No. 1,203,863, by changing the cam slot in the adding'cam )late N so that it is of general compoumlcurve shape without an enlargement or head, the accumulator can be converted into a straight adding accumulater. I haveprovided a cam slot which is of general compound curve formation and whose margins are parallel throughout, excepit at the ends.

he pin N of the toothed detent segment N projects into the cam slot 55" and thus the detent segment N which is pivoted to the late N" at N",is controlled solely by t e position and movement of the adding cam plate N and is adapted only to swing in one direction when engaged wit the pinion or adding wheel N instead of bein adapted to swing in either direction when tlius engaged, according to the control thereof by both adding and substracting cam plates asin the Ellis Patent No. 1,203,863. The ,detent N is under the absolute control of the adding cam plate N due to the shapeof the cam slot 55". Then the cam plate N is restored to normal posi tion, the detent N is compelled to swing to the right in the various figures of the 40 drawings. \Vhen the cam plate N is unlatched by the disengagement of the adding hook N" therefrom. the spring N instant- 1y acts and when the cam plate is free to move under the action of said spring. the detent segment N necessarily is compelled to swing to the left on its pivot N and as this action occurs when said detent is engaged with the adding wheel N, carrying 18 thereby effected.

The carrying-bar N" is adapted to cooperate with all of the adding cam plates N to re-latch them and it is provided with upwardly extending arms at its ends which are pivoted at N to the side frames of the machine (not shown). The carrying bar N is normall held in its retracted position as shown in ig 1 by suitable springs.

The raising and lowering of the frame N" and the wheels N, and the operationof the carrying bar N are similar to the operation of the corresponding mechanisms in the Ellis Patent No. 1,203.863. The means for raising and lowering the frame N is identical with the means used for that purpose in the Ellis Patent No. 1,203,863. The mechthe subtracting cam have slots which receive rollers N on the ends of the shaft N that carries the adding wheels N and. as explained in the aforesaid Ellis patent, the cams N determine the upward and downward movements of the frame N to cause the wheels N to either engage the detents N or the racks R, according to conditions.

A rocker arm 65" which is carried by the shaft N and has an antifriction roller A" on its end, is latched in either the position shown in Figs 2 and 14,which is the normal position, or in the position shown in Figs. 8 and 11, which is the abnormal position, by a scissors-like latching device comprising pieces A and 169* which areprov'ided with suitable notches A and 170 to receive and hold'the roller A in the normal and abnormal positions assumed by the rocker 65". The pieces A and 169" are pivoted to the frame or side plate of the machine at A" and they are drawn together by a spring A. This arrangement securely holds the arm 65 in its forward and rearward position without requiring any releasin mechanism to spread the parts A", 169, W en the shaft N. is turned.

Pivoted at 14" to the side plates of the carrying bar N is a piece N which has ahooked extremity that is made to cooperate with a pin or roller 40" on the arm 65"' by the action of a spring N.

A hook N" which is suitably pivoted to the frame, is adapted to engagethe roller or pin 13 when the bar N" moves forwardly, there being provided a spring D to actuate the hook N for that purpose. The hook is suitably pivoted at N and is provided with an upwardly extending (part or horn which is adapted to be engage by the roller A when the arm 65" is in'normal position as shdwn in Fig. 2, which results in the release of the roller 13 so that the spring (not shown) which holds the carrying bar N in normal position may act to restore it to that position.

\Vhen the arm 65 moves forwardly as shown in Figs. 5, 8 and 11, the spring D, causes the hook N to engage the roller 13 and latch the carrying bar N in its advanced position.

The normal osition of the mechanism is as shown in igs. 1, 2 and 3, the adding wheels N being then disengaged from tinracks R and engaged with the detent segments N \Vhen the machine is operated the parts first assume the position shown in Figs. 4, 5 and 6. The cam N has now 1, the shaft N to be rocked backwardly to-' lposition shown in Figs 2' ts in the cam N raising caused the wheels N to enga the racks R and the turning of the shai t N has resulted in the roller 40 pulling the piece N, thereby drawing the carrying bar N" forwardly until it engages the adding cams N. In the extreme forward position, the bar N" restores'to latched position any cam plates N which have been previous y unlatched so that they are held by the hooks N. The final forward movement of the operating means of the machine brin the mechanisms to the position shown in Figs 7, 8 and 9 but the shape of the slot in the cams N" is such that there is no change in the position of the shaft N in relation to the shaft N.'

The ca bar N" dro s back, leaving the gap but is retained y the hook N" as shown in Fi 7 and 8.

The return 0 the racks R to their normal position causes the wheels N to be turned correspondingly and during this 0 eration if the twopoint cam N en ges an passes the point a of the hook the lug. w is disengaged from the adding cam N whereupon said cam drops back and engages the carrying bar N" which operation is shown in Fig. 10. At this time the carrying bar N" is still latched in its forward position by the roller 13. The completion of the cycle of operations of the machine causes ward the normal and 3.- This resu the frame N and bringing the wheels N into mesh with the detent se 'ents N. The action also results'in the ro er A engaging the horn on the hook N" thereby disengaging said hook from the" roller 13". The carrying bar N" now being free, its spring not shown) snaps it to position shown in igs 13- and 14. Inasmuch as the adding hook N has been released from the carrying cam N by the turning of the cam N (assuming that the wheels are in condition to efl'ect carrying), the cam N snaps back under the action of its spring N" and the detent'se ent N turns the adding wheel N" of a higher order a distance of one tooth. thus efl'ecting carrying.

On the next advance of the carrying bar N" the adding cam N is engaged thereby and becomes re-latched b the action of spring N on the latching 00k N.

I claim:

1. In an adding accumulator, the combination with a movable actuator, of an accumulator wheel normally disengaged from the actuator and adapted for engagement therewith, and carrying mechanism for said accumulator wheel com rising a movably mounted detent adapte to engage the accumulator wheel when said whee is free of its actuator and to become disen aged from the accumulator wheel when the atter is engaged by its actuator. and a shiftin member having an operative connection to the detent, adapting said member to positively move the detent in one direction to efi'ect carryin in the accumulator wheel and to positive y move it in the opposite direction to restore said detent to normal position and to retain it in that position.

2. In an adding accumulator, the combination with a movable actuator, of an accumulator wheel normally disengaged from the actuator and adapted for engagement therewith, and carrying mechanism for said accumulator wheel com rising a movably mounted detent adap to en a the accumulator wheel when said whee is free of its actuator and to become disen aged from the accumulator wheel when the latter is engaged by its actuator, and a movably mounted shifting member having a slot rovided with parallel walls extending em one end of the slot to its other end, the detent being provided with a pin which is re ceived in said slot, said pin and slot connection adapting said shiftmg member to p0s-' itively move the detent in one direction to effect carrying in the accumulator wheel and to positively move it in the opposite direction to restore said detent to normal position 3. In an adding accumulator, the combination with a movable actuator, of an accumulator wheel normally disengaged from the actuator and adapted for engagement therewith, and carrying mechanism for said accumulator wheel com rising a pivoted swinging detent adapte to en ge the accumulator wheel when said whee is free of its actuator and to become disen ged froni'the accumulator wheel when the atter is engaged by its actuator, and a pivoted shifting member provided with a compound curved slot havin parallel walls extending from one end of t e slot to its other end, the detent being provided with a pin received in said slot, said pin and slot connection adapting said shifting member to positivel move the detent in one direction to etiect carrying in the accumulator wheel and to positively move it in the opposite direction to restore said detent to normal position, a spring for actuating the shifting member to move the detent to effect carrying, and a spring actuated latching trip member for holding the shifting member in latched condition, said latching trip member being adapted for release by an accumulator wheel of a lower order.

4. In an adding accumulator, the combination with a movable actuator, of an accumulator wheel normally disengaged from the actuator and adapted for engagement therewith, and carrying mechanism for said accumulator wheel cohiprising a pivoted swinging detent adapted to en age the accumulator wheel when said whee is free of its actuator and to become disengaged said shifting member to positively move the from the accumulator wheel when the latdetent in one direction to effect carrying ter is engaged by its actuator, and a pivoted in the accumulator wheel and to positive y 10 shifting member provided with a compound move it in the-opposite direction to restore I curved s'lot having arallel walls, the detent said detent to normal position.

being provided wit a pin received in said In testimony whereof I aifix my signature. slot, said pin and slot connection adapting FREDERICK W. BERNAU. 

